A wideband slot-coupled inverted microstrip patch antenna for wireless communications

A wideband slot-coupled superstrate based microstrip patch antenna is presented for wireless communications. The antenna is designed by employing a stacked geometry and inverted configuration of patch antenna. The circular patch antenna design is used for the particular design. The proposed antenna is able to operate for a wide range of frequencies, i.e., 19.5-22.6 GHz. Through simulation, the impedance bandwidth is achieved up to 15% having VSWR less than 2. By employing a technique of thicker substrate and stacked geometry, maximum peak gain of 8.5 dBi of the antenna is achieved. The paper also presents a parametric study showing that the impedance of patch decreases with the change in patch dimension which also effects VSWR and gain of the antenna.